Add #define STMFTS_RETRY_COUNT 3 to retry stmfts_command() 3 times.
Without it, STMFTS_SYSTEM_RESET or STMFTS_SLEEP_OUT may return -110 to
failed attempt due to no event received for completion.
Signed-off-by: Lin, Meng-Bo <linmengbo0689@xxxxxxxxxxxxxx>
---
drivers/input/touchscreen/stmfts.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/input/touchscreen/stmfts.c b/drivers/input/touchscreen/stmfts.c
index bc11203c9cf7..d36be85a980e 100644
--- a/drivers/input/touchscreen/stmfts.c
+++ b/drivers/input/touchscreen/stmfts.c
@@ -68,6 +68,7 @@
#define STMFTS_DATA_MAX_SIZE (STMFTS_EVENT_SIZE * STMFTS_STACK_DEPTH)
#define STMFTS_MAX_FINGERS 10
#define STMFTS_DEV_NAME "stmfts"
+#define STMFTS_RETRY_COUNT 3
enum stmfts_regulators {
STMFTS_REGULATOR_VDD,
@@ -317,19 +318,20 @@ static irqreturn_t stmfts_irq_handler(int irq, void *dev)
static int stmfts_command(struct stmfts_data *sdata, const u8 cmd)
{
- int err;
+ int err, retry;
reinit_completion(&sdata->cmd_done);
- err = i2c_smbus_write_byte(sdata->client, cmd);
- if (err)
- return err;
-
- if (!wait_for_completion_timeout(&sdata->cmd_done,
- msecs_to_jiffies(1000)))
- return -ETIMEDOUT;
+ for (retry = 0; retry < STMFTS_RETRY_COUNT; retry++) {
+ err = i2c_smbus_write_byte(sdata->client, cmd);
+ if (err)
+ return err;
- return 0;
+ if (wait_for_completion_timeout(&sdata->cmd_done,
+ msecs_to_jiffies(1000)))
+ return 0;
+ }
+ return -ETIMEDOUT;
}
static int stmfts_input_open(struct input_dev *dev)
--
2.30.2
